Free tool · Edit
Video Compressor
Shrink a video file size fast with your device’s hardware encoder, or hit an exact size target.
Reduce a video’s file size right in your browser tab, using the same hardware video encoder your device uses for video calls and screen recording. Pick a quality preset, drop the resolution, or choose a size target like under 25 MB for Gmail or 10 MB for Discord, and see the estimated output size before you start. Your video is never uploaded.
- Files never leave your device
- Runs entirely in your browser
- Free, no account needed
How to use Video Compressor
Three steps, and nothing to install.
Drop your video
Add an MP4, MOV, WebM or MKV file. The tool reads its resolution, frame rate and length instantly.
Pick quality, resolution or a size target
Balanced suits most videos. Choose 720p for sharing, or a target like under 25 MB to fit an email. The estimated output size updates as you change settings.
Compress and download
Encoding runs on your device’s hardware encoder with a live progress bar and time remaining, then you download the smaller MP4.
More free tools
Free, private, and no sign-up on any of them.
How this works in your browser
The file is read with Mediabunny, a lightweight media toolkit, and re-encoded through WebCodecs, the browser API that exposes your device’s own video encoder. The output is H.264 video with AAC audio in an MP4 with its index at the front, so it plays everywhere and starts streaming before it fully downloads. The bitrate is planned from the video’s real resolution, frame rate and length, and is never set higher than the source already uses, so compressing an already efficient file cannot make it bigger. Browsers without WebCodecs fall back automatically to FFmpeg compiled to WebAssembly.
Video Compressor vs. upload-based online tools
| Feature | Video Compressor (in-browser) | Upload-based online tools |
|---|---|---|
| File upload required | No - never leaves your device | Yes - file is sent to a server |
| Processing queue | None - starts instantly | Often, especially at peak times |
| Watermark on output | Never | Common on free plans |
| Usage limits | None - free, unlimited use | Often capped per day or file size |
| Works offline once loaded | Yes, for most tools | No - requires a live connection |
| Account required | No | Often, for anything beyond a trial |
Who uses Video Compressor
Getting under an upload limit
Pick a size target to clear the cap on Gmail, Discord, WhatsApp or a web form in one go.
Sharing phone footage
Turn a large 4K or 60fps recording into a 1080p or 720p clip that sends quickly over mobile data.
Confidential recordings
Compress internal meetings, client footage or personal video without uploading it to a service.
Freeing up storage
Reduce oversized clips you want to keep but rarely watch at full quality.
Frequently asked questions
What it can and cannot do, and what happens to your files.
How much smaller will my video get?
Phone and camera footage usually shrinks by 50 to 80% on the Balanced preset at the same resolution, and by 85 to 95% when you also drop to 720p. The tool shows an estimated output size before you compress, so there is no guessing.
Why is it so fast?
It uses WebCodecs, the browser’s built-in video encoder, which hands the work to your device’s graphics or media chip where available. That is the same hardware that records video on your phone, and it is many times faster than encoding in software.
Can I compress a video to a specific size?
Yes. Choose a target such as under 10 MB (Discord), 16 MB (WhatsApp) or 25 MB (Gmail) and the tool calculates the bitrate that fits your video’s length. Very long videos with a small target will look soft, so lowering the resolution as well helps.
Is there a file size limit?
No hard limit. Files of several hundred megabytes work in Chrome and Edge, since the video is read in pieces rather than loaded into memory all at once.
Would lowering the resolution shrink it more?
Usually yes. Going from 4K to 1080p removes three quarters of the pixels, which saves far more than a quality change alone. For anything watched on a phone, 1080p or 720p is plenty.
Which browsers are supported?
Chrome, Edge and recent Safari and Firefox versions use the fast hardware engine. Older browsers automatically switch to a slower compatibility engine (a one-time download of about 10MB) so the tool still works.
Is my video uploaded anywhere?
No. The video is read, re-encoded and saved entirely inside your browser tab. Nothing is sent to a server.
Compress your video fast - free, runs in your browser.
Files never leave your device. No upload, no account, and free for unlimited use.